The group leaves NIOZ at the end of the “R” workshop. A poignant moment …
Wednesday 28th October. Day 3: Rob Witbaard and Chris Richardson led the group in some practical fieldwork investigating variability of shellfish distribution. We took advantage of some decent weather to step out of the classroom to a nearby tidal flat where we collected cockles along three 300 metre transects then took them back to the lab to measure them and assess the length frequency distribution along the transects.
Monday 26th October – Day 1: Julian and Rob led the group in a shell ID exercise. Some of these blighters look very similar …
Posted by Paul
The next ARAMACC training event isn’t just a workshop. It isn’t even a double workshop. This time we are offering us a TRIPLE workshop featuring “Ecology of long-lived bivalves”, “Attracting funding” and “Introduction to R”. With Rob Witbaard leading, this will take place at the world-famous Netherlands Institute of Sea Research (NIOZ) on the breezy and bracing North Sea resort island of Texel. With this workshop happening in the last week of October, it could well be exceptionally breezy!
The workshop takes us from the welcome dinner on Sunday 25th through to Friday 30th October – or the following Monday for those who are braving the optional “R” workshop: the full schedule is here.
The workshops will feature some exciting and distinguished guests:
Dr Bryan Black from University of Texas at Austin, dendrochronologist, sclerochronologist and proven expert in the integration of ecological variables to build multicentennial climate reconstructions. Bryan will be introducing us to the use of multivariate analysis in ecology and leading an exercise in the application of multivariate methods to existing datasets.
Dr David Reynolds from the School of Earth and Ocean Sciences at Cardiff, who is currently aiming to publish the first 1,000-year annually resolved marine temperature record and who has just obtained funding from NERC for a pan-Atlantic sclerochronology project (CLAM – Climate of the LAst Millennium). David will be contributing to the grant capture workshop.
In addition some of the ARAMACC regulars will be offering their expertise, with Julian introducing us to taxonomy and bivalve identification (useful as I suspect some of us can only identify about two species), while Chris, Paul and Rob will describe their experiences obtaining – or more often failiong to obtain – grant funding. We’ll also – I hope (weather permitting) – get out of the classroom, when Rob takes us to sample Cerastoderma on the tidal flat.
A few of us will be presenting and/or organizing the ARAMACC session at EGU in Vienna next Wednesday. The talk session starts early at 8-30, then we have a poster session in the afternoon at 17-30. The full session lists are below, with links to the abstracts.
And massive thanks to the co-convenors Amy, Tamara, Stella, Juan, Eduardo, Bernd and Paul for organizing everything so efficiently
Update Thursday 16th April from Vienna. The ARAMACC session yesterday was very successful, a full session of six excellent talks (two on corals, one on giant clams, the other three on Arctica) expertly chaired and kept to time by Juan and Tamara. The room was well filled, with many old friends coming along. Our poster session was in the afternoon, more great presentations, marshalled by Amy and supplied with goodies by Stella. We had a prominent position close to the beer and wine (enough said). Photos will appear on the website in a few days.
Wednesday, 15 Apr 2015 8:30 – 10:15 am
A 350 Year Cloud Cover Reconstruction Deduced from Caribbean Coral Proxies
Amos Winter, Paul Sammarco, Uwe Mikolajewicz, Mark Jury, and Davide Zanchettin
The Role of Ca and Mg in Controlling the Skeletal Composition of Scleractinian Corals
Peter Swart, Sharmila Giri, Quinn Devlin, and Jess Adkins
Daily growth and tidal rhythms resolved in modern and Miocene giant clams via ultra-high resolution LA-ICPMS analysis and image processing
Viola Warter and Wolfgang Müller
Annually resolved seawater temperature variability of the Sub-polar North Atlantic over the last 1000 years
David Reynolds, James Scourse, Ian Hall, Alexandra Nederbragt, Alan Wanamaker, Paul Halloran, Paul Butler, Chris Richardson, Jon Eiríksson, Jan Heinemeier, and Karen Luise Knudsen
Oceanographic conditions govern shell growth of Arctica islandica (Bivalvia) in surface waters off Northeast Iceland
Soraya Marali and Bernd R. Schöne
Teleconnections between proxy sites of Arctica Islandica in simulated and observed sea surface temperatures in the North Atlantic Ocean
Maria Pyrina, Sebastian Wagner, and Eduardo Zorita
Attendance Time: Wednesday, 15 Apr, 17:30–19:00
Coral Records of Sea-surface Temperature, Salinity and Density in Western Indonesia: Implications to 20th Century Indonesian Throughflow Variations
Intan Suci Nurhati, Sri Yudawati Cahyarini, and Edward Boyle
Strontium/lithium ratios in shells of Cerastoderma edule – A potential temperature proxy for brackish environments
Christoph S. Füllenbach, Bernd R. Schöne, and Regina Mertz-Kraus
Annually resolved sclerochronological reconstructions of the climate variability of North Atlantic water masses around the Faroe Islands
Fabian Bonitz and Carin Andersson
Using Mg/Ca on oyster shells as paleoclimatic proxy, example from the Paleogene of Central Asia.
Laurie Bougeois, Marc de Rafélis, Gert-Jan Reichart, Lennart de Nooijer, and Guillaume Dupont-Nivet
Reconstructing coastal environmental condition in the eastern Norwegian Sea by means of Arctica islandica sclerochronological records
Tamara Trofimova and Carin Andersson
Environmental effects on shell microstructures of Cerastoderma edule
Stefania Milano, Bernd R. Schöne, and Rob Witbaard
Strontium and barium incorporation into freshwater bivalve shells
Liqiang Zhao and Bernd R. Schöne
Incremental task: Extending the existing 109 year Fladen Ground master chronology using the annual increments of the ocean quahog Arctica islandica
Juan Estrella-Martínez, Paul Butler, James Scourse, and Christopher Richardson
An annually-resolved palaeoenvironmental archive for the Eastern Boundary North Atlantic upwelling system: Sclerochronology of Glycymeris glycymeris (Bivalvia) shells from the Iberian shelf
Pedro Freitas, Carlos Monteiro, Paul Butler, David Reynolds, Christopher Richardson, Miguel Gaspar, and James Scourse
High-resolution elemental records of Glycymeris glycymeris (Bivalvia) shells from the Iberian upwelling system: Ontogeny and environmental control
Pedro Freitas, Christopher Richardson, Simon Chenery, Paul Butler, David Reynolds, Miguel Gaspar, and James Scourse
Tropical Atlantic temperature seasonality at the end of the last interglacial
Thomas Felis, Cyril Giry, Denis Scholz, Gerrit Lohmann, Madlene Pfeiffer, Jürgen Pätzold, Martin Kölling, and Sander R. Scheffers
Assessing the utility of elemental ratios as a paleotemperature proxy in shells of patelloid limpets
Lauren Graniero, Donna Surge, and David Gillikin
Examining the reproducibility of stable isotope ratios in the marine bivalve, Astarte borealis, from populations in the White Sea, Russia: implications for biological consequences of climate change
Justin McNabb and Donna Surge
Now that we are back from a very successful cruise to the Faroes and Viking Bank, we can decorate the website with some of the many pictures that were taken on the cruise. Shortly I will put up a page on the Pictures menu, but first, Alejandro’s Flickr page is worth a visit for some stunning seascapes (such as the moody panaorama of the Faroes above) and pictures of some of the wildlife which paid us a temporary visit before being returned to the deep …
Morning of 13th November: Continuing our shells collection cruise, our next site, a little further south on the Faroes Bank, came up with another surprise: hundreds of live collected specimens of Glycymeris glycymeris. We know this species (which can live up to 200 years) from St Kilda, the west coats of Scotland and points south, but we weren’t expecting to find it this far west in the north Atlantic and as far as I know it has not been found elsewhere in the Faroes.
Shortly afterwards, the weather began to turn, and in the light of predicted bad weather around the Faroes, we decided to head across to our other main area of interest, where we were planning to collect shells for Tamara. This was Viking Bank in the northern North Sea/Norwegian Sea. Tamara and Rob planned a full 80 potential stations in three separate areas. Winds reached force 8 on the journey across to Viking Bank, and we were thankful for the relative stability of GO Sars. At a session of presentations in the ship’s seminar room, we got a bit of detail about the very promising progress with the ARAMACC projects.
However, when we resumed dredging earlier this morning, the first tow on Viking Bank turned up nothing except a few chunks of mud.
Evening of 14th November: We’ve worked on two main sites on Viking Bank with variable success. Modern Arctica islandica here are small compared with specimens from earlier in the Holocene. This may reflect sea level rise in the area: early Holocene specimens, living when large parts of the North Sea were still dry land, would have been living in coastal environments, with more nutrients, and were therefore able to grow faster than is possible nowadays. These older shells have the kind of size and thickness that we see nowadays in Arctica from around the UK coast.
While some trawls turned up the older shells in large numbers, more recent specimens, and especially the live animals that Tamara was most interested in seemed to be more elusive. A small adjustment to the connection between the winch and the dredge may have had the effect of allowing the dredge to dig deeper into the sediment, and the final trawl of the afternoon shift produced about 30 live clams.
We left Bergen at 17:00 Saturday 8th Nov, and took a 36 hour transit to first station (the seas reasonably calm considering the time of year), arriving at our first collection site off the SE of the Faroes at about 5am Monday 10th Nov.
10th November: With sauna, solarium and gym, GO Sars is a well equipped ship. I’m not sure how much time we’ll have to use them though, since all the scientists will spend 12 hours of each day collecting and processing shells (and some are having to spend time in their rooms “acclimatizing” to life at sea). For the past 24 hours we have been working off the SE side of the Faroes, at a grid of sites where Arctica has been collected before. Here, we’ve collected a fair number of dead shells and a few live specimens, and also some shells from animals that died more recently (articulated shells* – these are cases where the two valves are still attached even though there is no animal inside them). Most of the dead shells are of uncertain date; experience of other sites suggests that they could have lived anything from a few hundred to a few thousand years ago. They are generally in good condition, however, and may easily contribute to a long chronology.
Morning of 11th November: Switching the following night to a site off the SW of the islands, we struck dead Arctica gold. The four dredges we hauled (for six minutes each) were brimful with shell material, nearly all of it single Arctica valves. All told we may have collected 5,000 shells in these four dredges, suggesting that the sea floor in this area is covered in these shells. Live material was less abundant (there may be a number of reasons for our not collecting live animals as efficiently as we might have, including the effectiveness of the dredge, or the possibility that at this time of the year many animals may burrow further into the sediment), but we did retrieve thirty or so live animals, and also a large number of articulated pairs, which can generally be assumed to be very recently dead*.
*This is important for chronology construction. Shells from live collected animals with a known date of death can be used to anchor the chronology, while the articulated shells can be assumed from their condition to have died very recently and should easily crossmatch with the live specimens.
Here are some views of the impressive boat that will be taking us to the Faroes next week – the GO Sars